Persist PR 27007 daily-cap social block

[yvette-carlisle]

Summary

• Add a terminal social_post/v1 blocked record for openai-codex-pr-27007
• Record daily_cap_exceeded because 2026-06-09 Asia/Shanghai already has eight published @decodexspace status URLs
• Stop before reservation, Chrome compose, duplicate readback, or media generation because the cap gate fails first

Evidence

• Candidate: artifacts/github/social-candidates/openai-codex-pr-27007.json has decision.worthiness = publish, priority = critical, and mode = operator_impact
• Cap: checked social_post/v1 records for 2026-06-09 sum to eight published X URLs
• Open PR readback: no open social publication PRs were present when checked with routed hackink GitHub credentials
• Chrome/media: not attempted; no tabs opened and no media generated

Validation

• cargo run -p decodex --bin decodex -- radar validate artifacts/github/social-candidates artifacts/social/x -> OK (55 Radar artifact JSON files validated)